Half to charles k



improvement.

NiTED STATES PATENT EEICE.

CHARLES F. DOEBLER, OF HARTFORD, CONNECTICUT, ASSIGNOR OF ONE- HALF TO CHARLES K. BRYANT, OF SAME PLACE.

KNOB ATTACHMENT.

SPECIFICATION 'Olmng part 0f Letters Patent NO. 503,199, dated August 15, 1893.

Application filed October 1l., 1892. Serial No. 448,588. (No model.)

To all whom t may concern.-

Be it known that I, CHARLES F. DoEBLER,a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Knob Attachments, of which the following is a specification.

This invention relates to that class of knobattachments commonly known as adjustable knob-attachments; the object being to provide means for securely holding the knob in place on the spindle against falling or pushing,- and also for effecting the required iine adjustment of the knob to the thickness of the door.

In the drawings accompanying and forming a part of this specification, Figure 1 is a longitudinal section through an adjustable knob and fastening embodying my present invention. Fig. 2 is a sectional` view similar to Fig. 1, illustrating the operations of removing the knob from and replacingt it on its spindle. Fig. 3 is a view similar to Fig. 2, showing a modiiication of certain features of the Fig.4 is a longitudinal section, and Fig. 5 an end elevation, of the adj ustable sleeve, or bearing-washer. Fig. 6 is an end view of the locking-sleeve shown in Figs. 1 and 2; and Fig. 7 is a horizontal section of theY sleeve.

Similar characters designate 'like parts in all the figures.

My improved knob-attachment is shown, in

the drawings, applied to the spindle S, which is shown passing through the usual bore, 2, in a door, D, only a small portion of which is herein shown. Said spindle is made of a length to pass through the door to which the knob is to be applied, and should, of course, properly connect with the lock and latch to be operated thereby; but these parts, not being directly involved in my present improvements, arenot shown in this application.

The spindle S has a series of holes, as 5, bored transversely thereof for the passage of a pin, or key, as 7, which, as indicated in Figs. 1 and 2, also passes through one corresponding hole at 8 in the knob-stem 6 of the knob K. By this means the knob may be adjusted longitudinally of the spindle by distances equal to the distance between the centers ot' two adjacent pin-holes.

For receiving the thrust and for the purpose of adjusting the length of the knob-stem to correspond to the thickness of the door, said stem is internally bored and threaded to receive the threaded stem 9 of the bearingwasher or sleeve G, which sleeve is screwed into the knob-stem only so far as to bring the face (20, Fig. 4) thereof in proper contact with the side of the door, or in contact with a suitable bearing-plate, as l0, held against the door, as indicated in Figs. 1, 2 and 3.

The knob-stem 6 is internally squared to closely fit the spindle S and to slide freely thereon. The adjustable sleeve G is also internally squared (see Fig. 5) to Iit closely and slide freely on the spindle. In consequence of this construction, when the knob and said adj ustable'sleeve are in place on the spindle, as in Figs. 1, 2 and 3, said sleeve cannot be turned relatively to the knob, being held, as

set forth,by the engagement thereof with the spindle. For adjusting the sleeve relatively to -the knob-stem, it is thereforenecessary to take the knob from the spindle, screw the sleeve G in or out as the case may require, and replace the knob upon the spindle. This mode of adjustment may be readily carried out by taking a measure of the amount of adj ustment required, before removing the knobstem.

The sleeve N is placed upon the outside of the knob-stem, and should be of a length, as indicated in Fig. 2,permitting it to be moved toward the door, within the usual escutcheonplate or rose R, sufficiently far to uncover the pin, or key, 7, for permitting this to be taken out. On removal of said key, the knob, together with its accessory devices, is free to be slid o from the spindle. For the purpose of retaining said sleeve N in place, this has ini ternally thereof a thread, 12, which engages a corresponding thread, 13, on the knob-stem. For screwing on and unscrewing the sleeve, this may have externally thereof the hexagonal portion 14,1itted for engaging a suitable wrench.

When assembling the knob and spindle, the sleeve G being in the position on the knobstem shown in Fig. 2, the knob is slid upon the spindle until the face 2O ot' the sleeve Gstrikes the wearing-plate 10 of the door. The operator then, looking through the hole 8, observes whether or not this coincides with one of the holes 5 in the spindle; if not, he removes the knob again and screws the bearlng-sleeve G in or ont from the knob as the ca se may require, and thus by trial adjusts said sleeve to properly bear against the door when said hole 8 in the knob-stem comes in exact alignment with one or the other of said holes 5 in the spindle. This adjustment having been obtained, the pin, or key, 7, is slid through said bore and through the spindle, after Which the protecting-sleeve N is screwed outward on the knob-stem from the position shown in Fig. 2 to that shown in Fig.` 1, thus covering the hole 8 and locking the key 7 securely in place, and at the same time securing the desired finish of the knob by closing the space at 15, Fig. 2.

In some cases where the appearance, or iinish, of the knob is not important, the sleeve N may be omitted, and asuitable screw, or screw-key, as 16, and a corresponding series of threaded holes at 17, formed on the spindle, may be substituted for the aforesaid pin and pin-holes 7 and 8 in Figs. 1 and 2. The mode of adjusting this modification of my invention is substantially the same as that hereinbefore described in connection with the construction shown in Figs. 1 and 2.

By means of my present improvement, the holes 5 on the spindle may be of compara` tively small diameter, thus permitting them to be placed at relatively short distances apart from center to center of the holes, so that a relatively small amount of adjustment is required for the bearing-sleeve G; and this being squared as described, or otherwise shaped to fit the polygonal spindle, permits of a very Iine adjustment so as to closely adapt the knob to the thickness of the door to which for attaching knobs to spindles-one of which screws is shown at 16 in Fig. 3.

Vhen about to disassemble the parts, the sleeve N (when this is used) is turned back from the position shown in Fig. 1 to that shown in Fig. 2, from over the holes 8, thus leaving the key 7 accessible for removal. When turned back as described, the shoulder, or face, 18,013' the sleeve N comes against the inner side, 19, of the adjustable Washer G, and (the knob-stem and Washer being still on the spindle) frictionally locks together the three parts G, N and K, so that these will normally remain together as one part ready for replacing on the spindle in precisely their former positions, Without requiring readjustment. This feature is, in practice, of much convenience and utility.

Having thus described my invention, I claim- 1. In a knob-attachment, the combination with the squared or angular spindle, of the knob-stem internally squared to fit the spindle, the adjustable sleeve squared to lit said spindle and engaging the knob-stein by a screw-thread, as set forth, and a removable key for holding the knob-stem in place on the spindle, substantially as described.

2. In a knob-attachment, the combination with the spindle, the knob-stem, and a removable key for connecting said spindle and stem, of the adjustable bearing sleeve fitted to slide, but not to rotate, on the spindle, and a locking-sleeve adapted for holding said key in place when uncovering the key and to lock the bearing-sleeve in place, substantially as set forth.

3. In a knob-attachment, the combination with a squared spindle, of the internallysquared knob-stein, the internally-squared sleeve adjustable longitudinally of the knobstem, a key for connecting the knob-stem and spindle, and means as specilied for locking the key in place Within the knob-stem and spindle, substantially as described.

CHARLES F. DOEBLER.

Witnesses:

FRANCIS H. RICHARDS, CHARLES K. BRYANT. 

